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dryan

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About dryan

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  1. dryan

    chemicals.

    I've heard of Pirahna Bath being quite dangerous. (Peroxymonosulfuric Acid) http://yarchive.net/chem/piranha_solution.html The last post in that thread is a must read.
  2. Yeah, but 10M HCl has a pH of -1, and 10M BaOH has a pH of 15, so the scale from 0-14 only works for dilute acids and bases (less than 1M)
  3. It worked. I guess neither one was set as default, so it opened in both. Go figure.
  4. When I click on a link in Outlook, both IE and Firefox opens the page. Any way to fix this?
  5. http://yarchive.net/chem/piranha_solution.html An interesting (and scary) read.
  6. I've got a similar question: For a serial cable, can the computer detect when two of the pins are connected? In my case, I want to connect two wires to a spst mometary switch so that a program can detect when it is depressed.
  7. dryan

    Battery Tester

    I have a voltmeter (multimeter); how can I use this to test AA and AAA batteries? If I am correct, simply touching the leads of the voltmeter to the contacts of the battery would almost always give me a reading of 1.5 volts. I think by adding a resistor, I can get a correct reading. How do I calculate what value resistor I need?
  8. Chemistry is a heck of a lot easier than history. The latter is only memorization, and none of it makes any sense or follows a pattern.
  9. I got to hear a lecture from Michio Kaku at the National Science Bowl last year in D.C., where he gave a good analogy for understanding the theory of a multidimensional universe. The number of dimensions is inconsequential, to me at least. The theory behind it is more important. You can read that analogy at his website: http://www.mkaku.org/articles/hyper_and_toe.shtml
  10. Theraputic or reproductive is wrong? Keep in mind, with theraputic cloning, you aren't growing an entire human. You grow a dish of stem cells that will specialize into a needed type of cell. You just need a cheek swab of the person to be cloned and an empty embryo (which is a possible moral dilemma, but not IMO). I assume you know this, but haven't read any other threads on cloning.
  11. XP Home is. XP Professional isn't, from what I hear.
  12. Theraputic human cloning can potentially cure dozens of diseases and problems, including heart disease, liver disease, Parkinson's, diabetes, paralysis, blindness, and baldness. I don't know anyone who approves of reproductive human cloning.
  13. I got this t-shirt for my birthday that says: TIME IS AN INVENTION I get people asking me what this means, so what do you think? How should I respond to their inquiry?
  14. Thanks apathy, I tried emphasis that a salt bath is necessary. A saturated NaCl solution is easy to make and works flawlessly. I did some work with a model hydrogen fuel cell car last year, which operates by the electrolysis and synthesis of H2O. In that instance, however, we used a proton exchange membrane (PEM). http://www.humboldt.edu/~serc/animation.html Using a proton exchange membrane for these processes are much "cleaner" than other methods - there is no burning involved in the synthesis and no electrolyte dissolved in the water; the catalyst takes care of those things. However, the cell only produces ~2volts, so a stack of cells in necessary in powering most devices.
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